Question

Solve: 100= 250(.989)^t

Answer 1

1) divide by \(250\) and start with \[.4=(.989)^t\]

Answer 2

2) use the change of base formula and get
\[t=\frac{\ln(.4)}{\ln(.989)}\]

Answer 3

Is the answer 82.8?

Answer 4

yes

Answer 5

Thank you!!

Answer 6

yw